When Frank discovers that the source of the funneled money is in fact Xander Feng, he gets Feng to end his partnership with Tusk in exchange for a lucrative bridge contract.Though Raymond Tusk wields major influence over the president, Frank aims to drive a wedge between them. He meets Xander Feng, a Chinese businessman and ally of Tusk's,House of Cards Seasons 1-4 DVD to engage in backchannel diplomatic negotiations which Frank intentionally scuttles, though he uses the chaos of the situation to make it appear as if Tusk is equally responsible for the failed talks. This sours Sino-U.S. relations and leads to a trade war over rare earth minerals and a spike in U.S. energy prices.House of Cards Seasons 1-4 Tusk openly opposes the president's efforts to deal with the crisis and begins having a tribal casino funnel money into Republican PACs in retaliation.